Pathological false alarm rates following damage to the left frontal cortex

In this study we present further data on case JB who developed memory impairment following a ruptured aneurysm of the anterior communicating artery which resulted in damage centered on the frontal cortex. The data reveal that JB's memory impairment is characterized by a retail impairment in which intrusion rates are abnormally high and a recognition deficit characterized by an exceptionally high false alarm rates. A comparison is made between this case and other recent cases involving impairments with a similar etiology. Theoretical interpretations of JB's deficit are also considered. (C) 1996 Academic Press, Inc.